| Title | Measurement of R(D) and R(D*) with a Semileptonic Tagging Method |
| Authors | Caria, G. Urquijo, P. Adachi, I Aihara, H. Al Said, S. Asner, D. M. Atmacan, H. Aushev, T. Babu, V Badhrees, I Bahinipati, S. Bakich, A. M. Behera, P. Beleno, C. Bennett, J. Bhuyan, B. Bilka, T. Biswal, J. Bozek, A. Bracko, M. Browder, T. E. Campajola, M. Cervenkov, D. Chang, P. Cheaib, R. Chekelian, V Chen, A. Cheon, B. G. Chilikin, K. Cho, H. E. Cho, K. Choi, Y. Choudhury, S. Cinabro, D. Cunliffe, S. Dash, N. De Nardo, G. Di Capua, F. Di Carlo, S. Dolezal, Z. Dong, T., V Eidelman, S. Epifanov, D. Fast, J. E. Ferber, T. Ferlewicz, D. Fulsom, B. G. Garg, R. Gaur, V Gabyshev, N. Garmash, A. Giri, A. Goldenzweig, P. Greenwald, D. Grzymkowska, O. Guan, Y. Hartbrich, O. Hayasaka, K. Hayashii, H. Higuchi, T. Hou, W-S Hsu, C-L Iijima, T. Inami, K. Inguglia, G. Ishikawa, A. Itoh, R. Iwasaki, M. Iwasaki, Y. Jacobs, W. W. Jeon, H. B. Jia, S. Jin, Y. Joffe, D. Joo, K. K. Kaliyar, A. B. Kang, K. H. Karyan, G. Kawasaki, T. Kichimi, H. Kim, C. H. Kim, D. Y. Kim, H. J. Kim, K. T. Kim, S. H. Kinoshita, K. Kodys, P. Korpar, S. Kotchetkov, D. Krizan, P. Kroeger, R. Krohn, J-F Krokovny, P. Kuhr, T. Kumar, R. Kwon, Y-J Lange, J. S. Lee, I. S. Lee, J. K. Lee, S. C. Li, L. K. Li, Y. B. Li Gioi, L. Libby, J. Lieret, K. Liventsev, D. Luo, T. MacQueen, C. Masuda, M. Matsuda, T. Matvienko, D. Merola, M. Metzner, F. Miyabayashi, K. Mohanty, G. B. Moon, T. J. Mori, T. Mussa, R. Nakamura, K. R. Nakao, M. Nath, K. J. Nayak, M. Nisar, N. K. Nishida, S. Nishimura, K. Ogawa, K. Ono, H. Onuki, Y. Oskin, P. Pakhlov, P. Pakhlova, G. Pal, B. Pang, T. Park, H. Park, S-H Patra, S. Paul, S. Pedlar, T. K. Pestotnik, R. Piilonen, L. E. Popov, V Prencipe, E. Prim, M. T. Rabusov, A. Resmi, P. K. Ritter, M. Rozanska, M. Russo, G. Sahoo, D. Sakai, Y. Sandilya, S. Santelj, L. Sanuki, T. Savinov, V Schneider, O. Schnell, G. Schueler, J. Schwanda, C. Schwartz, A. J. Seino, Y. Senyo, K. Sevior, M. E. Shebalin, V Shiu, J-G Shwartz, B. Simon, F. Sokolov, A. Solovieva, E. Staric, M. Stottler, Z. S. Sumiyoshi, T. Sutcliffe, W. Takizawa, M. Tamponi, U. Tanida, K. Tenchini, F. Trabelsi, K. Uchida, M. Uglov, T. Uno, S. Usov, Y. Vahsen, S. E. Van Tonder, R. Varner, G. Varvell, K. E. Vossen, A. Waheed, E. Wang, B. Wang, C. H. Wang, M-Z Wang, P. Wang, X. L. Watanuki, S. Wiechczynski, J. Won, E. Yamamoto, H. Yang, S. B. Ye, H. Yin, J. H. Yuan, C. Z. Zhang, Z. P. Zhilich, V Zhukova, V Zhulanov, V |
| Affiliation | Univ Basque Country, UPV EHU, Bilbao 48080, Spain Beihang Univ, Beijing 100191, Peoples R China Brookhaven Natl Lab, Upton, NY 11973 USA Budker Inst Nucl Phys SB RAS, Novosibirsk 630090, Russia Charles Univ Prague, Fac Math & Phys, CR-12116 Prague, Czech Republic Chonnam Natl Univ, Gwangju 61186, South Korea Univ Cincinnati, Cincinnati, OH 45221 USA DESY, D-22607 Hamburg, Germany Duke Univ, Durham, NC 27708 USA Fudan Univ, Key Lab Nucl Phys & Ion Beam Applicat MOE, Shanghai 200443, Peoples R China Fudan Univ, Inst Modern Phys, Shanghai 200443, Peoples R China Justus Liebig Univ Giessen, D-35392 Giessen, Germany Georg August Univ Gottingen, Phys Inst 2, D-37073 Gottingen, Germany SOKENDAI Grad Univ Adv Studies, Hayama, Kanagawa 2400193, Japan Hanyang Univ, Dept Phys, Seoul 04763, South Korea Hanyang Univ, Inst Nat Sci, Seoul 04763, South Korea Univ Hawaii, Honolulu, HI 96822 USA High Energy Accelerator Res Org, KEK, Tsukuba, Ibaraki 3050801, Japan High Energy Accelerator Res Org, KEK, Theory Ctr, J PARC Branch, Tsukuba, Ibaraki 3050801, Japan Forschungszentrum Julich, D-52425 Julich, Germany Basque Fdn Sci, Ikerbasque, Bilbao 48013, Spain Indian Inst Sci Educ & Res Mohali, Sas Nagar 140306, India Indian Inst Technol Bhubaneswar, Satya Nagar 751007, India Indian Inst Technol Guwahati, Gauhati 781039, Assam, India Indian Inst Technol Hyderabad, Hyderabad 502285, Telangana, India Indian Inst Technol Madras, Chennai 600036, Tamil Nadu, India Indiana Univ, Bloomington, IN 47408 USA Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China Inst High Energy Phys, A-1050 Vienna, Austria Inst High Energy Phys, Protvino 142281, Russia INFN, Sez Napoli, I-80126 Naples, Italy INFN, Sez Torino, I-10125 Turin, Italy Japan Atom Energy Agcy, Adv Sci Res Ctr, Naka, Ibaraki 3191195, Japan J Stefan Inst, Ljubljana 1000, Slovenia Karlsruher Inst Technol, Inst Expt Teilchenphys, D-76131 Karlsruhe, Germany Univ Tokyo, Kavli Inst Phys & Math Universe WPI, Kashiwa, Chiba 2778583, Japan Kennesaw State Univ, Kennesaw, GA 30144 USA King Abdulaziz City Sci & Technol, Riyadh 11442, Saudi Arabia King Abdulaziz Univ, Fac Sci, Dept Phys, Jeddah 21589, Saudi Arabia Kitasato Univ, Sagamihara, Kanagawa 2520373, Japan Korea Inst Sci & Technol Informat, Daejeon 34141, South Korea Korea Univ, Seoul 02841, South Korea Kyungpook Natl Univ, Daegu 41566, South Korea Univ Paris Sud, Univ Paris Saclay, IN2P3, CNRS,LAL, F-91898 Orsay, France Ecole Polytech Fed Lausanne, CH-1015 Lausanne, Switzerland Russian Acad Sci, PN Lebedev Phys Inst, Moscow 119991, Russia Ludwig Maximilians Univ Munchen, D-80539 Munich, Germany Luther Coll, Decorah, IA 52101 USA Univ Maribor, SLO-2000 Maribor, Slovenia Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany Univ Melbourne, Sch Phys, Melbourne, Vic 3010, Australia Univ Mississippi, University, MS 38677 USA Univ Miyazaki, Miyazaki 8892192, Japan Moscow Phys Engn Inst, Moscow 115409, Russia Moscow Inst Phys & Technol, Dolgoprudnyi 141700, Moscow Region, Russia Nagoya Univ, Grad Sch Sci, Nagoya, Aichi 4648602, Japan Nagoya Univ, Kobayashi Maskawa Inst, Nagoya, Aichi 4648602, Japan Univ Napoli Federico II, I-80055 Naples, Italy Nara Womens Univ, Nara 6308506, Japan Natl Cent Univ, Chungli 32054, Taiwan Natl United Univ, Miaoli 36003, Taiwan Natl Taiwan Univ, Dept Phys, Taipei 10617, Taiwan H Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland Nippon Dent Univ, Niigata 9518580, Japan Niigata Univ, Niigata 9502181, Japan Novosibirsk State Univ, Novosibirsk 630090, Russia Osaka City Univ, Osaka 5588585, Japan Pacific Northwest Natl Lab, Richland, WA 99352 USA Panjab Univ, Chandigarb 160014, India Peking Univ, Beijing 100871, Peoples R China Univ Pittsburgh, Pittsburgh, PA 15260 USA Punjab Agr Univ, Ludhiana 141004, Punjab, India RIKEN, Theoret Res Div, Nishina Ctr, Wako, Saitama 3510198, Japan Univ Sci & Technol China, Hefei 230026, Peoples R China Seoul Natl Univ, Seoul 08826, South Korea Showa Pharmaceut Univ, Tokyo 1948543, Japan Soongsil Univ, Seoul 06978, South Korea Univ South Carolina, Columbia, SC 29208 USA Sungkyunkwan Univ, Suwon 16419, South Korea Univ Sydney, Sch Phys, Sydney, NSW 2006, Australia Univ Tabuk, Fac Sci, Dept Phys, Tabuk 71451, Saudi Arabia Tata Inst Fundamental Res, Mumbai 400005, Maharashtra, India Tech Univ Munich, Dept Phys, D-85748 Garching, Germany Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan Univ Tokyo, Earthquake Res Inst, Tokyo 1130032, Japan Univ Tokyo, Dept Phys, Tokyo 1130033, Japan Tokyo Inst Technol, Tokyo 1528550, Japan Tokyo Metropolitan Univ, Tokyo 1920397, Japan Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA Wayne State Univ, Detroit, MI 48202 USA Yamagata Univ, Yamagata 9908560, Japan Yonsei Univ, Seoul 03722, South Korea Univ Ljubljana, Fac Math & Phys, Ljubljana 1000, Slovenia Univ Basque Country, UPV EHU, Bilbao 48080, Spain Beihang Univ, Beijing 100191, Peoples R China Brookhaven Natl Lab, Upton, NY 11973 USA Budker Inst Nucl Phys SB RAS, Novosibirsk 630090, Russia Charles Univ Prague, Fac Math & Phys, CR-12116 Prague, Czech Republic Chonnam Natl Univ, Gwangju 61186, South Korea Univ Cincinnati, Cincinnati, OH 45221 USA DESY, D-22607 Hamburg, Germany Duke Univ, Durham, NC 27708 USA Fudan Univ, Key Lab Nucl Phys & Ion Beam Applicat MOE, Shanghai 200443, Peoples R China Fudan Univ, Inst Modern Phys, Shanghai 200443, Peoples R China Justus Liebig Univ Giessen, D-35392 Giessen, Germany Georg August Univ Gottingen, Phys Inst 2, D-37073 Gottingen, Germany SOKENDAI Grad Univ Adv Studies, Hayama, Kanagawa 2400193, Japan Hanyang Univ, Dept Phys, Seoul 04763, South Korea Hanyang Univ, Inst Nat Sci, Seoul 04763, South Korea Univ Hawaii, Honolulu, HI 96822 USA High Energy Accelerator Res Org, KEK, Tsukuba, Ibaraki 3050801, Japan High Energy Accelerator Res Org, KEK, Theory Ctr, J PARC Branch, Tsukuba, Ibaraki 3050801, Japan Forschungszentrum Julich, D-52425 Julich, Germany Basque Fdn Sci, Ikerbasque, Bilbao 48013, Spain Indian Inst Sci Educ & Res Mohali, Sas Nagar 140306, India Indian Inst Technol Bhubaneswar, Satya Nagar 751007, India Indian Inst Technol Guwahati, Gauhati 781039, Assam, India Indian Inst Technol Hyderabad, Hyderabad 502285, Telangana, India Indian Inst Technol Madras, Chennai 600036, Tamil Nadu, India Indiana Univ, Bloomington, IN 47408 USA Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China Inst High Energy Phys, A-1050 Vienna, Austria Inst High Energy Phys, Protvino 142281, Russia INFN, Sez Napoli, I-80126 Naples, Italy INFN, Sez Torino, I-10125 Turin, Italy Japan Atom Energy Agcy, Adv Sci Res Ctr, Naka, Ibaraki 3191195, Japan J Stefan Inst, Ljubljana 1000, Slovenia Karlsruher Inst Technol, Inst Expt Teilchenphys, D-76131 Karlsruhe, Germany Univ Tokyo, Kavli Inst Phys & Math Universe WPI, Kashiwa, Chiba 2778583, Japan Kennesaw State Univ, Kennesaw, GA 30144 USA King Abdulaziz City Sci & Technol, Riyadh 11442, Saudi Arabia King Abdulaziz Univ, Fac Sci, Dept Phys, Jeddah 21589, Saudi Arabia Kitasato Univ, Sagamihara, Kanagawa 2520373, Japan Korea Inst Sci & Technol Informat, Daejeon 34141, South Korea Korea Univ, Seoul 02841, South Korea Kyungpook Natl Univ, Daegu 41566, South Korea Univ Paris Sud, Univ Paris Saclay, IN2P3, CNRS,LAL, F-91898 Orsay, France Ecole Polytech Fed Lausanne, CH-1015 Lausanne, Switzerland Russian Acad Sci, PN Lebedev Phys Inst, Moscow 119991, Russia Ludwig Maximilians Univ Munchen, D-80539 Munich, Germany Luther Coll, Decorah, IA 52101 USA Univ Maribor, SLO-2000 Maribor, Slovenia Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany Univ Melbourne, Sch Phys, Melbourne, Vic 3010, Australia Univ Mississippi, University, MS 38677 USA Univ Miyazaki, Miyazaki 8892192, Japan Moscow Phys Engn Inst, Moscow 115409, Russia Moscow Inst Phys & Technol, Dolgoprudnyi 141700, Moscow Region, Russia Nagoya Univ, Grad Sch Sci, Nagoya, Aichi 4648602, Japan Nagoya Univ, Kobayashi Maskawa Inst, Nagoya, Aichi 4648602, Japan Univ Napoli Federico II, I-80055 Naples, Italy Nara Womens Univ, Nara 6308506, Japan Natl Cent Univ, Chungli 32054, Taiwan Natl United Univ, Miaoli 36003, Taiwan Natl Taiwan Univ, Dept Phys, Taipei 10617, Taiwan H Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland Nippon Dent Univ, Niigata 9518580, Japan Niigata Univ, Niigata 9502181, Japan Novosibirsk State Univ, Novosibirsk 630090, Russia Osaka City Univ, Osaka 5588585, Japan Pacific Northwest Natl Lab, Richland, WA 99352 USA Panjab Univ, Chandigarb 160014, India Peking Univ, Beijing 100871, Peoples R China Univ Pittsburgh, Pittsburgh, PA 15260 USA Punjab Agr Univ, Ludhiana 141004, Punjab, India RIKEN, Theoret Res Div, Nishina Ctr, Wako, Saitama 3510198, Japan Univ Sci & Technol China, Hefei 230026, Peoples R China Seoul Natl Univ, Seoul 08826, South Korea Showa Pharmaceut Univ, Tokyo 1948543, Japan Soongsil Univ, Seoul 06978, South Korea Univ South Carolina, Columbia, SC 29208 USA Sungkyunkwan Univ, Suwon 16419, South Korea Univ Sydney, Sch Phys, Sydney, NSW 2006, Australia Univ Tabuk, Fac Sci, Dept Phys, Tabuk 71451, Saudi Arabia Tata Inst Fundamental Res, Mumbai 400005, Maharashtra, India Tech Univ Munich, Dept Phys, D-85748 Garching, Germany Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan Univ Tokyo, Earthquake Res Inst, Tokyo 1130032, Japan Univ Tokyo, Dept Phys, Tokyo 1130033, Japan Tokyo Inst Technol, Tokyo 1528550, Japan Tokyo Metropolitan Univ, Tokyo 1920397, Japan Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA Wayne State Univ, Detroit, MI 48202 USA Yamagata Univ, Yamagata 9908560, Japan Yonsei Univ, Seoul 03722, South Korea Univ Ljubljana, Fac Math & Phys, Ljubljana 1000, Slovenia |
| Keywords | DECAYS |
| Issue Date | 24-Apr-2020 |
| Publisher | PHYSICAL REVIEW LETTERS |
| Abstract | The experimental results on the ratios of branching fractions R(D) = B((B) over bar -> D tau(-)(nu) over bar (tau))/B((B) over bar -> Dl(-)(nu) over bar (e)) and R(D*) = B((B) over bar -> D*tau(-)(nu) over bar (tau))/B((B) over bar -> D*tau(-)(nu) over bar (e)), where l denotes an electron or a muon, show a long-standing discrepancy with the standard model predictions, and might hint at a violation of lepton flavor universality. We report a new simultaneous measurement of R(D) and R(D*), based on a data sample containing 772 x 10(6) B (B) over bar events recorded at the T(4S) resonance with the Belle detector at the KEKB e(+) e(-) collider. In this analysis the tag-side B meson is reconstructed in a semileptonic decay mode and the signal-side tau is reconstructed in a purely leptonic decay. The measured values are R(D) = 0.307 +/- 0.037 +/- 0.016 and R(D*) = 0.283 +/- 0.018 +/- 0.014, where the first uncertainties are statistical and the second are systematic. These results are in agreement with the standard model predictions within 0.2, 1.1, and 0.8 standard deviations for R(D), R(D*), and their combination, respectively. This work constitutes the most precise measurements of R(D) and R(D*) performed to date as well as the first result for R(D) based on a semileptonic tagging method. |
| URI | http://hdl.handle.net/20.500.11897/588409 |
| ISSN | 0031-9007 |
| DOI | 10.1103/PhysRevLett.124.161803 |
| Indexed | SCI(E) Scopus |
| Appears in Collections: | 待认领 |
